300-820 · Question #19
300-820 Question #19: Real Exam Question with Answer & Explanation
The correct answer is C: The signaling does not make it back to the endpoint because the firewall cannot inspect. A NAT ALG is similar to a firewall ALG, but a NAT ALG actually changes (maps) the addresses and ports in the signaling messages. The NAT ALG cannot inspect the contents of encrypted signaling messages.
Question
What happens to the encrypted signaling traffic of a collaboration device if you place it inside a firewall with private IP addresses and try to make a call over IP without any collaboration infrastructure?
Options
- AThe signaling makes it back to the endpoint because the firewall is an application layer
- BEncrypted IP traffic for collaboration devices always is trusted by the firewall.
- CThe signaling does not make it back to the endpoint because the firewall cannot inspect
- DThe signaling makes it back to the endpoint because the endpoint sent the private address to
Explanation
A NAT ALG is similar to a firewall ALG, but a NAT ALG actually changes (maps) the addresses and ports in the signaling messages. The NAT ALG cannot inspect the contents of encrypted signaling messages.
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